*{
    margin: 0;
    padding: 0;
}
a{
    list-style: none;
}
li{
    list-style: none;
}
.lunbo{
    width: 100%;
    height: 100% !important;
    margin-top: 5px;
}
.content{
    width: 86% !important;
    height: 309px;
    margin:  auto;
    position: relative;
}
#contentUl{
    margin: 0;
    padding: 0;
    width: 100%;    
    height: 209px;
}
.contentItem{
    width: 100%;   
    position: absolute;
    opacity: 0;
    transition: all 1s;
}
.contentItem.active{    
    opacity:1;
}
#contentUl img{
    width: 100% !important;
    height: 309px;
}
#btn-left{
    width: 30px;
    height: 39px;
    font-size: 30px;
    color: white;
    background-color:rgba(146, 143, 143, 0.4);
    line-height: 39px;
    /* padding-left:5px; */
    z-index: 10;/*始终显示在图片的上层*/
    position: absolute;
    left: 0;
    top: 50%;
    transform: translateY(-50%);/*使按钮向上偏移居中对齐*/
    cursor: pointer;
    opacity: 1;/*平时隐藏*/
    border-top-right-radius: 20px;
    border-bottom-right-radius: 20px;
}
#btn-left:hover {
    background-color:rgba(0,0,0,0.4);
}
 
#btn-right{
    width: 30px;
    height: 39px;
    font-size: 30px;
    color: white;
    background-color:rgba(146, 143, 143, 0.4);
    line-height: 39px;
    padding-left: 8px;
    z-index: 10;
    position: absolute;
    right: 0;
    top: 50%;
    cursor: pointer;
    opacity: 1;
    transform: translateY(-50%);
    border-top-left-radius: 20px;
    border-bottom-left-radius: 20px;
}
#btn-right:hover {
    background-color:rgba(0,0,0,0.4);
}
#circle{
    height: 20px;
    display: flex;
    position: absolute;
    bottom: 0px;
    left: 25px;
}
.circle{
    width: 10px;
    height: 10px;
    border-radius: 10px;
    border: 2px solid white;
    background: rgba(0,0,0,0.4);
    cursor: pointer;
    margin: 5px;
}
.white{
    background-color: #FFFFFF;
}